Your best - and probably only - possibility for contacting individuals who served with him is the division's veterans association. Here are two addresses that may or may not be current:
90th Infantry Division Association 1017 North 40th Street Fort Smith, AR72904-6932
90th Infantry Division Association P. O. Box 730 South Hill, VA23970-0730
Don't expect a whole lot. These guys are rapidly disappearing and an increasing number of these divisional and regimental associations are disbanding as their respective memberships decline. Also, being a private organization, the association can only provide info on those who are - or have been - members or who have been in contact with the association for one reason or another. When you contact the above, inquire as to whether the 359th Infantry Association is still active and, if so, ask for the address.
If you haven't already, you might want to request his deceased file. You'll find practical instructions at message number 2112, this forum (go back to the main page, enter "2112" in the box in the upper right corner labeled "Jump to #____" and click on "GO").